Consolidated Statements of Shareholder's Equity - USD ($) $ in Millions	Total	Common stock	Additional paid- in capital	Accumulated other comprehensive loss	Accumulated deficit
Balance at beginning of period at Dec. 31, 2020	$ 1,427	$ 2	$ 4,632	$ (70)	$ (3,137)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	166			12	154
Balance at end of period at Dec. 31, 2021	1,593	2	4,632	(58)	(2,983)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	414			9	405
Share-based compensation	5		5
Issuance of stock in business combination	511	1	510
Dividend to US Holding	(396)				(396)
Balance at end of period at Dec. 31, 2022	2,127	3	5,147	(49)	(2,974)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income	170			2	168
Share-based compensation	28		28
Balance at end of period at Dec. 31, 2023	$ 2,325	$ 3	$ 5,175	$ (47)	$ (2,806)